This is part Q2CSA8 which is the Elevator control horn for the Q2 and Q-200. This transmits movement from the control stick to the elevator torque tubes.
Richard Kaczmarek from FLAPS (Fast Little AirPlanes) uses industry standard NDT (Non-Destructive Testing) to ensure no defects in all the metal parts they supply. They are built to the precise dimensions shown on the Metal Parts Drawings for sale here on the QBA website.
Lead time is approximately 10 days.